Some reason not adding the pic correctly but got them today was advised for the cfm of my intake head and carbs and for how ill be driving and events ill be wanting to do a 40-50mm length velocity stack is best so I went ahead and have got 43mm billet Bell end stacks being that I already have a uni filter backing plate and cage with foam filter the cage is just not long enough so ill have to space the cage a little from the backing plate and still be able to use the uni filter along with it